Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e5623e4c68b14ee…

MALICIOUS

PDF

46.0 KB Created: 2020-08-04 03:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9219a233e3107b7fb84d28b40ee243b4 SHA-1: ff9a702c279e31c288c1944f740e984bf1ff0714 SHA-256: 3e5623e4c68b14ee061d2788411a182791cca14d07fce7749a2092a0a23d2f69
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'college bonafide certificate pdf' and the malicious URL, suggesting a social engineering lure. The presence of a link farm further indicates an attempt to distribute malicious content or SEO manipulation.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=college+bonafide+certificate+pdf
    • http://files.reisbordsclass.com/uploads/1/3/0/8/130874012/3f74f64b9.pdf
    • http://files.woburnxctrack.com/uploads/1/3/1/4/131482954/joliva-madetazitiwatoj.pdf
    • http://files.pp-distribution.com/uploads/1/3/0/7/130740166/sanezade.pdf
    • https://cdn.shopify.com/s/files/1/0432/4648/5672/files/getokalazuluvux.pdf
    • https://cdn.shopify.com/s/files/1/0433/5042/5750/files/30155526088.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/bovejiwinumaputivapedexax.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/supofozavu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8050/6785/files/microplastic_pollution_in_table_salts_from_china.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/91224367941.pdf
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/68988331114.pdf
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/savonigewef.pdf
    • https://cdn.shopify.com/s/files/1/0432/6028/0982/files/kowes.pdf
    • https://cdn.shopify.com/s/files/1/0438/2903/5158/files/vegavobimolutuvabu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1257/0783/files/10418855811.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/etc_hosts_windows.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/blockchain_explication_technique.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077bc.bin
0568c65757f5f780276ceded4d022067d2a741b05b00136306b9c283d3b1e467		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BC 5192 bytes
font_01_sfnt_off0000896f.bin
e295b28f969f01121ef30760a5ecf91f21d927ae0b454bdc8a90b64ef2fe1c1f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x896F 9896 bytes

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